CN200970284Y

CN200970284Y - Marmem cervical vertebra artificial intervertebral disc

Info

Publication number: CN200970284Y
Application number: CNU200620039791XU
Authority: CN
Inventors: 赵定麟; 赵杰; 王新伟
Original assignee: Individual
Current assignee: Individual
Priority date: 2006-02-28
Filing date: 2006-02-28
Publication date: 2007-11-07
Anticipated expiration: 2016-02-28

Abstract

An artificial cervical disc made of shape memory alloys comprises a tongue-shaped cervical disc and a support ball made of shape memory alloys, wherein the SMA support ball is threadlike spherical or spring-shaped, made of NT-2 medical SMA. The utility model not only has a rational design and convenient use, but can help cervical segments recover physiological functions through the expansion, inclination and rotation of the tongue-shaped artificial cervical disc. The utility model can be applied for treatment of acute cervical disc herniation where anterior cervical discectomy is needed and other corresponding cases.

Description

A kind of marmem cervical vertebra artificial intervertebral disk

Technical field

This utility model relates to medical instruments field, is a kind of marmem cervical vertebra artificial intervertebral disk.

Technical background

The life and the change of working method are bowed, are bent over and drive the prolongation of time such as seat, all can cause the regression of spinal column intervertebral disc.The regression of intervertebral disc can cause nerve root or compression of spinal cord and corresponding symptoms occur that severe patient can influence people's orthobiosis and work, and brings heavy financial burden for individual, family and society; The spinal injury of traffic accident initiation in recent years is also increasing in addition.The person of being in a bad way needs operative treatment more in the above-mentioned case, and China has the crowd of hundreds thousand of examples every year approximately.Spinal operation is of a great variety, comprises decompression, the fixation that resets and orthopedic procedure etc.Need merged operation vertebra joint more in the art, with the effect that obtains to stablize.But the vertebra that loses original movable function saves after surgery the several months or the several years often causes regression to be quickened because of the neighbouring section load increases, even new pathological changes occurs and the art of having to execute once more.As making vertebra save the still original movable function of tool after surgery, both guaranteed the physiological status of human body, slowed down the degree of degeneration of adjacent vertebra joint again, this has more clinical meaning.

Summary of the invention

This utility model provides a kind of marmem cervical vertebra artificial intervertebral disk, to solve the artificial intervertebral disk that cervical spondylopathy patient recovers vertebra joint physiological function operation demand, manually push away intercalated disc and the marmem fulcrum ball is formed by the ligule cervical vertebra, described ligule cervical vertebra artificial intervertebral disk back is curved to link to each other by hinge type or continous way with inferior articular surface.System adopts that to have wear-resisting, anti-corrosion, endurance, tissue is not had teratogenesis, infringement such as carcinogenic and the good medical marmem of NT-2 of biocompatibility be material.Especially the medical marmem of NT-2 is a material, and it is out of shape when low temperature, but i.e. Free Transform in 4～10 ℃ of cold water, and in normal body temperature, promptly then resile immediately and original intensity at 36～37 ℃ of states.Utilize this specific character, before implanting intervertebral space, place 4～10 ℃ of cold water to make it be distortion and plastic state in the lump in ligule cervical vertebra artificial intervertebral disk and silk bulk elastic force ball or spring ball earlier; Operator will comprise that with finger the whole artificial intervertebral disk of a bulk elastic force ball or elastic force ball flattens and implants in the intervertebral space under deformation state; Implant artificial intervertebral disk in the intervertebral space and influenced in moment by the human body normal body temperature promptly to recover original form, elasticity and intensity, and have joint effect between artificial vertebral body.

This utility model is made of support, elastic force apparatus two parts of tongue-like shape memorial alloy cervical vertebra artificial intervertebral disk and homogeneous material.

This utility model provides a kind of cervical vertebra artificial intervertebral disk of formative memory alloy, and is not only reasonable in design, easy to use, and recovers vertebra joint physiological function by flexible, side direction of tongue shape cervical vertebra artificial intervertebral disk and rotation.

This utility model needing can be used for acute cervical disc herniation and other corresponding cases of throat road discectomy decompression.

Description of drawings

Fig. 1 is this utility model marmem cervical vertebra artificial intervertebral disk naturalness decomposing schematic representation;

Fig. 2 is the resilient supporting unit in this utility model;

Fig. 3 is this utility model deformation state sketch map;

Fig. 4 is this utility model elements combination state.Wherein: Fig. 1 is a kind of front elevational schematic, hinge type or continous way ligule cervical vertebra artificial intervertebral disk, Fig. 2 resilient supporting unit, A pompon type, two kinds of B spring types; Fig. 3 is that ligule cervical vertebra artificial intervertebral disk and bracing or strutting arrangement are put into 4～10 ℃ of cold salines and dwindled, be out of shape sketch map, and C is a naturalness, and D is a pressurizing and deformation state in the frozen water; Fig. 4 is cervical vertebra artificial intervertebral disk and the various combination naturalness of bracing or strutting arrangement sketch map.

Symbol description:

11 marmem ligule cervical vertebra artificial intervertebral disks, 111 agnails, 112 hinge types or continous way, 113 baffle plates, 121 pompon type resiliency supported balls, 122 cylindrical support springs, 123 disc springs support open configuration, 124 another kind of disc springs support open configuration, the disc support spring after 125 distortion.

The specific embodiment

Following embodiment further specifies the present invention, is limited to content of the present utility model but can not limit.

By this utility model marmem cervical vertebra artificial intervertebral disk shown in the accompanying drawing 1～4, form by marmem ligule cervical vertebra artificial intervertebral disk 11 and two kinds of elements of bracing or strutting arrangement.Ligule cervical vertebra artificial intervertebral disk 11, its top is the pan that central authorities are the knuckle shape, and length 14～16mm can be respectively 14,15 or 16mm, and width is 11～13mm, can be 11,12 or 13mm; The place ahead is similar, slightly downward-sloping to cervical vertebra vertebra joint inferior articular surface, and the back is curved to link to each other 112 with the human body inferior articular surface by hinge type or continous way, and this hinge type or continous way continuous 112 can improve the intensity of ligule cervical vertebra artificial intervertebral disk 11; Below silver width is 11mm, mid point partially before the both sides of 1mm the agnail 111 of a long 3mm, the wide 1.5mm of substrate is respectively arranged, sting point and be 45 °～85 ° towards the place ahead; The below patch lengths is 18～20mm, can be respectively 18,19 and 20mm, and is long respectively than the same specification element in top, as long 4mm.The side links to each other 113 with the baffle plate of one 5～6mm length before silver, prevents that element from slipping into backward.Last inferior articular surface spacing 3～5mm can be respectively 3,4 and 5mm, makes it have corresponding elasticity.

Described bracing or strutting arrangement 121,122,123,124 or 125, also pompon or the telescopic spring assembly by the formative memory alloy constitutes, and is spheroidal or spring shape, and diameter is respectively 3,4 and three kinds of specifications of 5mm, plays the support and the telescopic action of intervertebral disc.

This utility model cervical vertebra artificial intervertebral disk in use, earlier target vertebra part is carried out diskectomy, measure the sagittal diameter and the height of target vertebra part afterwards, select the artificial intervertebral disk of corresponding specification and support elastic force apparatus to put to 4～10 ℃ of cold water, earlier the support elastic force apparatus of deformable is put into the ligule intervertebral disc, the patient makes crack between the artificial intervertebral disk be varied down to original about 2/3～1/2 with finger pressurization, artificial intervertebral disk can more easily pass through narrow intervertebral space collar extension under this state, through intervertebral space deep, baffle plate is close to the vertebral body antetheca just.Afterwards, the artificial intervertebral disk of implantation can be subjected to the body temperature effect and resile rapidly, and has the load-bearing and the movable function of intervertebral disc.The arc of this marmem cervical vertebra artificial intervertebral disk is towards nape, and silver is towards throat side.

Claims

1, a kind of marmem cervical vertebra artificial intervertebral disk is characterized in that being made up of ligule cervical vertebra artificial intervertebral disk and marmem fulcrum ball, and described ligule cervical vertebra artificial intervertebral disk back is curved to link to each other by hinge type or continous way with inferior articular surface.

2, a kind of marmem cervical vertebra artificial intervertebral disk as claimed in claim 1 is characterized in that the artificial intervertebral of described ligule cervical vertebra top is the central authorities pans of knuckle slightly, and the place ahead is downward-sloping slightly; Respectively there is an agnail preceding partially both sides in the inferior articular surface central point; The below patch lengths is long than the top.

3, a kind of marmem cervical vertebra artificial intervertebral disk as claimed in claim 2 is characterized in that the long 3mm of described agnail, the wide 1.5mm of substrate, and the thorn point is 45～85 ° of angles towards the place ahead.

4. a kind of marmem cervical vertebra artificial intervertebral disk as claimed in claim 2 is characterized in that the described central authorities pan of knuckle slightly, and length is respectively 14～16mm, and width is 11～13mm.

5, a kind of marmem cervical vertebra artificial intervertebral disk as claimed in claim 2 is characterized in that described marmem fulcrum ball is thread orange or spring-like, and diameter is respectively 3～5mm.

6, a kind of marmem cervical vertebra artificial intervertebral disk as claimed in claim 2 is characterized in that described below patch lengths is that 18～20mm, width are 11mm.

7, a kind of marmem cervical vertebra artificial intervertebral disk as claimed in claim 1 is characterized in that it is material that described marmem cervical vertebra artificial intervertebral disk adopts the medical marmem of NT-2.